| /* |
| * linux/drivers/char/pcmcia/synclink_cs.c |
| * |
| * $Id: synclink_cs.c,v 4.34 2005/09/08 13:20:54 paulkf Exp $ |
| * |
| * Device driver for Microgate SyncLink PC Card |
| * multiprotocol serial adapter. |
| * |
| * written by Paul Fulghum for Microgate Corporation |
| * paulkf@microgate.com |
| * |
| * Microgate and SyncLink are trademarks of Microgate Corporation |
| * |
| * This code is released under the GNU General Public License (GPL) |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
| * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| * OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq)) |
| #if defined(__i386__) |
| # define BREAKPOINT() asm(" int $3"); |
| #else |
| # define BREAKPOINT() { } |
| #endif |
| |
| #define MAX_DEVICE_COUNT 4 |
| |
| #include <linux/module.h> |
| #include <linux/errno.h> |
| #include <linux/signal.h> |
| #include <linux/sched.h> |
| #include <linux/timer.h> |
| #include <linux/time.h> |
| #include <linux/interrupt.h> |
| #include <linux/tty.h> |
| #include <linux/tty_flip.h> |
| #include <linux/serial.h> |
| #include <linux/major.h> |
| #include <linux/string.h> |
| #include <linux/fcntl.h> |
| #include <linux/ptrace.h> |
| #include <linux/ioport.h> |
| #include <linux/mm.h> |
| #include <linux/seq_file.h> |
| #include <linux/slab.h> |
| #include <linux/netdevice.h> |
| #include <linux/vmalloc.h> |
| #include <linux/init.h> |
| #include <linux/delay.h> |
| #include <linux/ioctl.h> |
| #include <linux/synclink.h> |
| |
| #include <asm/io.h> |
| #include <asm/irq.h> |
| #include <asm/dma.h> |
| #include <linux/bitops.h> |
| #include <asm/types.h> |
| #include <linux/termios.h> |
| #include <linux/workqueue.h> |
| #include <linux/hdlc.h> |
| |
| #include <pcmcia/cistpl.h> |
| #include <pcmcia/cisreg.h> |
| #include <pcmcia/ds.h> |
| |
| #if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINK_CS_MODULE)) |
| #define SYNCLINK_GENERIC_HDLC 1 |
| #else |
| #define SYNCLINK_GENERIC_HDLC 0 |
| #endif |
| |
| #define GET_USER(error,value,addr) error = get_user(value,addr) |
| #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0 |
| #define PUT_USER(error,value,addr) error = put_user(value,addr) |
| #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0 |
| |
| #include <linux/uaccess.h> |
| |
| static MGSL_PARAMS default_params = { |
| MGSL_MODE_HDLC, /* unsigned long mode */ |
| 0, /* unsigned char loopback; */ |
| HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */ |
| HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */ |
| 0, /* unsigned long clock_speed; */ |
| 0xff, /* unsigned char addr_filter; */ |
| HDLC_CRC_16_CCITT, /* unsigned short crc_type; */ |
| HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */ |
| HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */ |
| 9600, /* unsigned long data_rate; */ |
| 8, /* unsigned char data_bits; */ |
| 1, /* unsigned char stop_bits; */ |
| ASYNC_PARITY_NONE /* unsigned char parity; */ |
| }; |
| |
| typedef struct { |
| int count; |
| unsigned char status; |
| char data[1]; |
| } RXBUF; |
| |
| /* The queue of BH actions to be performed */ |
| |
| #define BH_RECEIVE 1 |
| #define BH_TRANSMIT 2 |
| #define BH_STATUS 4 |
| |
| #define IO_PIN_SHUTDOWN_LIMIT 100 |
| |
| #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK)) |
| |
| struct _input_signal_events { |
| int ri_up; |
| int ri_down; |
| int dsr_up; |
| int dsr_down; |
| int dcd_up; |
| int dcd_down; |
| int cts_up; |
| int cts_down; |
| }; |
| |
| |
| /* |
| * Device instance data structure |
| */ |
| |
| typedef struct _mgslpc_info { |
| struct tty_port port; |
| void *if_ptr; /* General purpose pointer (used by SPPP) */ |
| int magic; |
| int line; |
| |
| struct mgsl_icount icount; |
| |
| int timeout; |
| int x_char; /* xon/xoff character */ |
| unsigned char read_status_mask; |
| unsigned char ignore_status_mask; |
| |
| unsigned char *tx_buf; |
| int tx_put; |
| int tx_get; |
| int tx_count; |
| |
| /* circular list of fixed length rx buffers */ |
| |
| unsigned char *rx_buf; /* memory allocated for all rx buffers */ |
| int rx_buf_total_size; /* size of memory allocated for rx buffers */ |
| int rx_put; /* index of next empty rx buffer */ |
| int rx_get; /* index of next full rx buffer */ |
| int rx_buf_size; /* size in bytes of single rx buffer */ |
| int rx_buf_count; /* total number of rx buffers */ |
| int rx_frame_count; /* number of full rx buffers */ |
| |
| wait_queue_head_t status_event_wait_q; |
| wait_queue_head_t event_wait_q; |
| struct timer_list tx_timer; /* HDLC transmit timeout timer */ |
| struct _mgslpc_info *next_device; /* device list link */ |
| |
| unsigned short imra_value; |
| unsigned short imrb_value; |
| unsigned char pim_value; |
| |
| spinlock_t lock; |
| struct work_struct task; /* task structure for scheduling bh */ |
| |
| u32 max_frame_size; |
| |
| u32 pending_bh; |
| |
| bool bh_running; |
| bool bh_requested; |
| |
| int dcd_chkcount; /* check counts to prevent */ |
| int cts_chkcount; /* too many IRQs if a signal */ |
| int dsr_chkcount; /* is floating */ |
| int ri_chkcount; |
| |
| bool rx_enabled; |
| bool rx_overflow; |
| |
| bool tx_enabled; |
| bool tx_active; |
| bool tx_aborting; |
| u32 idle_mode; |
| |
| int if_mode; /* serial interface selection (RS-232, v.35 etc) */ |
| |
| char device_name[25]; /* device instance name */ |
| |
| unsigned int io_base; /* base I/O address of adapter */ |
| unsigned int irq_level; |
| |
| MGSL_PARAMS params; /* communications parameters */ |
| |
| unsigned char serial_signals; /* current serial signal states */ |
| |
| bool irq_occurred; /* for diagnostics use */ |
| char testing_irq; |
| unsigned int init_error; /* startup error (DIAGS) */ |
| |
| char *flag_buf; |
| bool drop_rts_on_tx_done; |
| |
| struct _input_signal_events input_signal_events; |
| |
| /* PCMCIA support */ |
| struct pcmcia_device *p_dev; |
| int stop; |
| |
| /* SPPP/Cisco HDLC device parts */ |
| int netcount; |
| spinlock_t netlock; |
| |
| #if SYNCLINK_GENERIC_HDLC |
| struct net_device *netdev; |
| #endif |
| |
| } MGSLPC_INFO; |
| |
| #define MGSLPC_MAGIC 0x5402 |
| |
| /* |
| * The size of the serial xmit buffer is 1 page, or 4096 bytes |
| */ |
| #define TXBUFSIZE 4096 |
| |
| |
| #define CHA 0x00 /* channel A offset */ |
| #define CHB 0x40 /* channel B offset */ |
| |
| /* |
| * FIXME: PPC has PVR defined in asm/reg.h. For now we just undef it. |
| */ |
| #undef PVR |
| |
| #define RXFIFO 0 |
| #define TXFIFO 0 |
| #define STAR 0x20 |
| #define CMDR 0x20 |
| #define RSTA 0x21 |
| #define PRE 0x21 |
| #define MODE 0x22 |
| #define TIMR 0x23 |
| #define XAD1 0x24 |
| #define XAD2 0x25 |
| #define RAH1 0x26 |
| #define RAH2 0x27 |
| #define DAFO 0x27 |
| #define RAL1 0x28 |
| #define RFC 0x28 |
| #define RHCR 0x29 |
| #define RAL2 0x29 |
| #define RBCL 0x2a |
| #define XBCL 0x2a |
| #define RBCH 0x2b |
| #define XBCH 0x2b |
| #define CCR0 0x2c |
| #define CCR1 0x2d |
| #define CCR2 0x2e |
| #define CCR3 0x2f |
| #define VSTR 0x34 |
| #define BGR 0x34 |
| #define RLCR 0x35 |
| #define AML 0x36 |
| #define AMH 0x37 |
| #define GIS 0x38 |
| #define IVA 0x38 |
| #define IPC 0x39 |
| #define ISR 0x3a |
| #define IMR 0x3a |
| #define PVR 0x3c |
| #define PIS 0x3d |
| #define PIM 0x3d |
| #define PCR 0x3e |
| #define CCR4 0x3f |
| |
| // IMR/ISR |
| |
| #define IRQ_BREAK_ON BIT15 // rx break detected |
| #define IRQ_DATAOVERRUN BIT14 // receive data overflow |
| #define IRQ_ALLSENT BIT13 // all sent |
| #define IRQ_UNDERRUN BIT12 // transmit data underrun |
| #define IRQ_TIMER BIT11 // timer interrupt |
| #define IRQ_CTS BIT10 // CTS status change |
| #define IRQ_TXREPEAT BIT9 // tx message repeat |
| #define IRQ_TXFIFO BIT8 // transmit pool ready |
| #define IRQ_RXEOM BIT7 // receive message end |
| #define IRQ_EXITHUNT BIT6 // receive frame start |
| #define IRQ_RXTIME BIT6 // rx char timeout |
| #define IRQ_DCD BIT2 // carrier detect status change |
| #define IRQ_OVERRUN BIT1 // receive frame overflow |
| #define IRQ_RXFIFO BIT0 // receive pool full |
| |
| // STAR |
| |
| #define XFW BIT6 // transmit FIFO write enable |
| #define CEC BIT2 // command executing |
| #define CTS BIT1 // CTS state |
| |
| #define PVR_DTR BIT0 |
| #define PVR_DSR BIT1 |
| #define PVR_RI BIT2 |
| #define PVR_AUTOCTS BIT3 |
| #define PVR_RS232 0x20 /* 0010b */ |
| #define PVR_V35 0xe0 /* 1110b */ |
| #define PVR_RS422 0x40 /* 0100b */ |
| |
| /* Register access functions */ |
| |
| #define write_reg(info, reg, val) outb((val),(info)->io_base + (reg)) |
| #define read_reg(info, reg) inb((info)->io_base + (reg)) |
| |
| #define read_reg16(info, reg) inw((info)->io_base + (reg)) |
| #define write_reg16(info, reg, val) outw((val), (info)->io_base + (reg)) |
| |
| #define set_reg_bits(info, reg, mask) \ |
| write_reg(info, (reg), \ |
| (unsigned char) (read_reg(info, (reg)) | (mask))) |
| #define clear_reg_bits(info, reg, mask) \ |
| write_reg(info, (reg), \ |
| (unsigned char) (read_reg(info, (reg)) & ~(mask))) |
| /* |
| * interrupt enable/disable routines |
| */ |
| static void irq_disable(MGSLPC_INFO *info, unsigned char channel, unsigned short mask) |
| { |
| if (channel == CHA) { |
| info->imra_value |= mask; |
| write_reg16(info, CHA + IMR, info->imra_value); |
| } else { |
| info->imrb_value |= mask; |
| write_reg16(info, CHB + IMR, info->imrb_value); |
| } |
| } |
| static void irq_enable(MGSLPC_INFO *info, unsigned char channel, unsigned short mask) |
| { |
| if (channel == CHA) { |
| info->imra_value &= ~mask; |
| write_reg16(info, CHA + IMR, info->imra_value); |
| } else { |
| info->imrb_value &= ~mask; |
| write_reg16(info, CHB + IMR, info->imrb_value); |
| } |
| } |
| |
| #define port_irq_disable(info, mask) \ |
| { info->pim_value |= (mask); write_reg(info, PIM, info->pim_value); } |
| |
| #define port_irq_enable(info, mask) \ |
| { info->pim_value &= ~(mask); write_reg(info, PIM, info->pim_value); } |
| |
| static void rx_start(MGSLPC_INFO *info); |
| static void rx_stop(MGSLPC_INFO *info); |
| |
| static void tx_start(MGSLPC_INFO *info, struct tty_struct *tty); |
| static void tx_stop(MGSLPC_INFO *info); |
| static void tx_set_idle(MGSLPC_INFO *info); |
| |
| static void get_signals(MGSLPC_INFO *info); |
| static void set_signals(MGSLPC_INFO *info); |
| |
| static void reset_device(MGSLPC_INFO *info); |
| |
| static void hdlc_mode(MGSLPC_INFO *info); |
| static void async_mode(MGSLPC_INFO *info); |
| |
| static void tx_timeout(struct timer_list *t); |
| |
| static int carrier_raised(struct tty_port *port); |
| static void dtr_rts(struct tty_port *port, int onoff); |
| |
| #if SYNCLINK_GENERIC_HDLC |
| #define dev_to_port(D) (dev_to_hdlc(D)->priv) |
| static void hdlcdev_tx_done(MGSLPC_INFO *info); |
| static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size); |
| static int hdlcdev_init(MGSLPC_INFO *info); |
| static void hdlcdev_exit(MGSLPC_INFO *info); |
| #endif |
| |
| static void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit); |
| |
| static bool register_test(MGSLPC_INFO *info); |
| static bool irq_test(MGSLPC_INFO *info); |
| static int adapter_test(MGSLPC_INFO *info); |
| |
| static int claim_resources(MGSLPC_INFO *info); |
| static void release_resources(MGSLPC_INFO *info); |
| static int mgslpc_add_device(MGSLPC_INFO *info); |
| static void mgslpc_remove_device(MGSLPC_INFO *info); |
| |
| static bool rx_get_frame(MGSLPC_INFO *info, struct tty_struct *tty); |
| static void rx_reset_buffers(MGSLPC_INFO *info); |
| static int rx_alloc_buffers(MGSLPC_INFO *info); |
| static void rx_free_buffers(MGSLPC_INFO *info); |
| |
| static irqreturn_t mgslpc_isr(int irq, void *dev_id); |
| |
| /* |
| * Bottom half interrupt handlers |
| */ |
| static void bh_handler(struct work_struct *work); |
| static void bh_transmit(MGSLPC_INFO *info, struct tty_struct *tty); |
| static void bh_status(MGSLPC_INFO *info); |
| |
| /* |
| * ioctl handlers |
| */ |
| static int tiocmget(struct tty_struct *tty); |
| static int tiocmset(struct tty_struct *tty, |
| unsigned int set, unsigned int clear); |
| static int get_stats(MGSLPC_INFO *info, struct mgsl_icount __user *user_icount); |
| static int get_params(MGSLPC_INFO *info, MGSL_PARAMS __user *user_params); |
| static int set_params(MGSLPC_INFO *info, MGSL_PARAMS __user *new_params, struct tty_struct *tty); |
| static int get_txidle(MGSLPC_INFO *info, int __user *idle_mode); |
| static int set_txidle(MGSLPC_INFO *info, int idle_mode); |
| static int set_txenable(MGSLPC_INFO *info, int enable, struct tty_struct *tty); |
| static int tx_abort(MGSLPC_INFO *info); |
| static int set_rxenable(MGSLPC_INFO *info, int enable); |
| static int wait_events(MGSLPC_INFO *info, int __user *mask); |
| |
| static MGSLPC_INFO *mgslpc_device_list = NULL; |
| static int mgslpc_device_count = 0; |
| |
| /* |
| * Set this param to non-zero to load eax with the |
| * .text section address and breakpoint on module load. |
| * This is useful for use with gdb and add-symbol-file command. |
| */ |
| static bool break_on_load; |
| |
| /* |
| * Driver major number, defaults to zero to get auto |
| * assigned major number. May be forced as module parameter. |
| */ |
| static int ttymajor=0; |
| |
| static int debug_level = 0; |
| static int maxframe[MAX_DEVICE_COUNT] = {0,}; |
| |
| module_param(break_on_load, bool, 0); |
| module_param(ttymajor, int, 0); |
| module_param(debug_level, int, 0); |
| module_param_array(maxframe, int, NULL, 0); |
| |
| MODULE_LICENSE("GPL"); |
| |
| static char *driver_name = "SyncLink PC Card driver"; |
| static char *driver_version = "$Revision: 4.34 $"; |
| |
| static struct tty_driver *serial_driver; |
| |
| /* number of characters left in xmit buffer before we ask for more */ |
| #define WAKEUP_CHARS 256 |
| |
| static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty); |
| static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout); |
| |
| /* PCMCIA prototypes */ |
| |
| static int mgslpc_config(struct pcmcia_device *link); |
| static void mgslpc_release(u_long arg); |
| static void mgslpc_detach(struct pcmcia_device *p_dev); |
| |
| /* |
| * 1st function defined in .text section. Calling this function in |
| * init_module() followed by a breakpoint allows a remote debugger |
| * (gdb) to get the .text address for the add-symbol-file command. |
| * This allows remote debugging of dynamically loadable modules. |
| */ |
| static void* mgslpc_get_text_ptr(void) |
| { |
| return mgslpc_get_text_ptr; |
| } |
| |
| /** |
| * line discipline callback wrappers |
| * |
| * The wrappers maintain line discipline references |
| * while calling into the line discipline. |
| * |
| * ldisc_receive_buf - pass receive data to line discipline |
| */ |
| |
| static void ldisc_receive_buf(struct tty_struct *tty, |
| const __u8 *data, char *flags, int count) |
| { |
| struct tty_ldisc *ld; |
| if (!tty) |
| return; |
| ld = tty_ldisc_ref(tty); |
| if (ld) { |
| if (ld->ops->receive_buf) |
| ld->ops->receive_buf(tty, data, flags, count); |
| tty_ldisc_deref(ld); |
| } |
| } |
| |
| static const struct tty_port_operations mgslpc_port_ops = { |
| .carrier_raised = carrier_raised, |
| .dtr_rts = dtr_rts |
| }; |
| |
| static int mgslpc_probe(struct pcmcia_device *link) |
| { |
| MGSLPC_INFO *info; |
| int ret; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("mgslpc_attach\n"); |
| |
| info = kzalloc(sizeof(MGSLPC_INFO), GFP_KERNEL); |
| if (!info) { |
| printk("Error can't allocate device instance data\n"); |
| return -ENOMEM; |
| } |
| |
| info->magic = MGSLPC_MAGIC; |
| tty_port_init(&info->port); |
| info->port.ops = &mgslpc_port_ops; |
| INIT_WORK(&info->task, bh_handler); |
| info->max_frame_size = 4096; |
| init_waitqueue_head(&info->status_event_wait_q); |
| init_waitqueue_head(&info->event_wait_q); |
| spin_lock_init(&info->lock); |
| spin_lock_init(&info->netlock); |
| memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS)); |
| info->idle_mode = HDLC_TXIDLE_FLAGS; |
| info->imra_value = 0xffff; |
| info->imrb_value = 0xffff; |
| info->pim_value = 0xff; |
| |
| info->p_dev = link; |
| link->priv = info; |
| |
| /* Initialize the struct pcmcia_device structure */ |
| |
| ret = mgslpc_config(link); |
| if (ret != 0) |
| goto failed; |
| |
| ret = mgslpc_add_device(info); |
| if (ret != 0) |
| goto failed_release; |
| |
| return 0; |
| |
| failed_release: |
| mgslpc_release((u_long)link); |
| failed: |
| tty_port_destroy(&info->port); |
| kfree(info); |
| return ret; |
| } |
| |
| /* Card has been inserted. |
| */ |
| |
| static int mgslpc_ioprobe(struct pcmcia_device *p_dev, void *priv_data) |
| { |
| return pcmcia_request_io(p_dev); |
| } |
| |
| static int mgslpc_config(struct pcmcia_device *link) |
| { |
| MGSLPC_INFO *info = link->priv; |
| int ret; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("mgslpc_config(0x%p)\n", link); |
| |
| link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO; |
| |
| ret = pcmcia_loop_config(link, mgslpc_ioprobe, NULL); |
| if (ret != 0) |
| goto failed; |
| |
| link->config_index = 8; |
| link->config_regs = PRESENT_OPTION; |
| |
| ret = pcmcia_request_irq(link, mgslpc_isr); |
| if (ret) |
| goto failed; |
| ret = pcmcia_enable_device(link); |
| if (ret) |
| goto failed; |
| |
| info->io_base = link->resource[0]->start; |
| info->irq_level = link->irq; |
| return 0; |
| |
| failed: |
| mgslpc_release((u_long)link); |
| return -ENODEV; |
| } |
| |
| /* Card has been removed. |
| * Unregister device and release PCMCIA configuration. |
| * If device is open, postpone until it is closed. |
| */ |
| static void mgslpc_release(u_long arg) |
| { |
| struct pcmcia_device *link = (struct pcmcia_device *)arg; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("mgslpc_release(0x%p)\n", link); |
| |
| pcmcia_disable_device(link); |
| } |
| |
| static void mgslpc_detach(struct pcmcia_device *link) |
| { |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("mgslpc_detach(0x%p)\n", link); |
| |
| ((MGSLPC_INFO *)link->priv)->stop = 1; |
| mgslpc_release((u_long)link); |
| |
| mgslpc_remove_device((MGSLPC_INFO *)link->priv); |
| } |
| |
| static int mgslpc_suspend(struct pcmcia_device *link) |
| { |
| MGSLPC_INFO *info = link->priv; |
| |
| info->stop = 1; |
| |
| return 0; |
| } |
| |
| static int mgslpc_resume(struct pcmcia_device *link) |
| { |
| MGSLPC_INFO *info = link->priv; |
| |
| info->stop = 0; |
| |
| return 0; |
| } |
| |
| |
| static inline bool mgslpc_paranoia_check(MGSLPC_INFO *info, |
| char *name, const char *routine) |
| { |
| #ifdef MGSLPC_PARANOIA_CHECK |
| static const char *badmagic = |
| "Warning: bad magic number for mgsl struct (%s) in %s\n"; |
| static const char *badinfo = |
| "Warning: null mgslpc_info for (%s) in %s\n"; |
| |
| if (!info) { |
| printk(badinfo, name, routine); |
| return true; |
| } |
| if (info->magic != MGSLPC_MAGIC) { |
| printk(badmagic, name, routine); |
| return true; |
| } |
| #else |
| if (!info) |
| return true; |
| #endif |
| return false; |
| } |
| |
| |
| #define CMD_RXFIFO BIT7 // release current rx FIFO |
| #define CMD_RXRESET BIT6 // receiver reset |
| #define CMD_RXFIFO_READ BIT5 |
| #define CMD_START_TIMER BIT4 |
| #define CMD_TXFIFO BIT3 // release current tx FIFO |
| #define CMD_TXEOM BIT1 // transmit end message |
| #define CMD_TXRESET BIT0 // transmit reset |
| |
| static bool wait_command_complete(MGSLPC_INFO *info, unsigned char channel) |
| { |
| int i = 0; |
| /* wait for command completion */ |
| while (read_reg(info, (unsigned char)(channel+STAR)) & BIT2) { |
| udelay(1); |
| if (i++ == 1000) |
| return false; |
| } |
| return true; |
| } |
| |
| static void issue_command(MGSLPC_INFO *info, unsigned char channel, unsigned char cmd) |
| { |
| wait_command_complete(info, channel); |
| write_reg(info, (unsigned char) (channel + CMDR), cmd); |
| } |
| |
| static void tx_pause(struct tty_struct *tty) |
| { |
| MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| unsigned long flags; |
| |
| if (mgslpc_paranoia_check(info, tty->name, "tx_pause")) |
| return; |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("tx_pause(%s)\n", info->device_name); |
| |
| spin_lock_irqsave(&info->lock, flags); |
| if (info->tx_enabled) |
| tx_stop(info); |
| spin_unlock_irqrestore(&info->lock, flags); |
| } |
| |
| static void tx_release(struct tty_struct *tty) |
| { |
| MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| unsigned long flags; |
| |
| if (mgslpc_paranoia_check(info, tty->name, "tx_release")) |
| return; |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("tx_release(%s)\n", info->device_name); |
| |
| spin_lock_irqsave(&info->lock, flags); |
| if (!info->tx_enabled) |
| tx_start(info, tty); |
| spin_unlock_irqrestore(&info->lock, flags); |
| } |
| |
| /* Return next bottom half action to perform. |
| * or 0 if nothing to do. |
| */ |
| static int bh_action(MGSLPC_INFO *info) |
| { |
| unsigned long flags; |
| int rc = 0; |
| |
| spin_lock_irqsave(&info->lock, flags); |
| |
| if (info->pending_bh & BH_RECEIVE) { |
| info->pending_bh &= ~BH_RECEIVE; |
| rc = BH_RECEIVE; |
| } else if (info->pending_bh & BH_TRANSMIT) { |
| info->pending_bh &= ~BH_TRANSMIT; |
| rc = BH_TRANSMIT; |
| } else if (info->pending_bh & BH_STATUS) { |
| info->pending_bh &= ~BH_STATUS; |
| rc = BH_STATUS; |
| } |
| |
| if (!rc) { |
| /* Mark BH routine as complete */ |
| info->bh_running = false; |
| info->bh_requested = false; |
| } |
| |
| spin_unlock_irqrestore(&info->lock, flags); |
| |
| return rc; |
| } |
| |
| static void bh_handler(struct work_struct *work) |
| { |
| MGSLPC_INFO *info = container_of(work, MGSLPC_INFO, task); |
| struct tty_struct *tty; |
| int action; |
| |
| if (debug_level >= DEBUG_LEVEL_BH) |
| printk("%s(%d):bh_handler(%s) entry\n", |
| __FILE__,__LINE__,info->device_name); |
| |
| info->bh_running = true; |
| tty = tty_port_tty_get(&info->port); |
| |
| while((action = bh_action(info)) != 0) { |
| |
| /* Process work item */ |
| if (debug_level >= DEBUG_LEVEL_BH) |
| printk("%s(%d):bh_handler() work item action=%d\n", |
| __FILE__,__LINE__,action); |
| |
| switch (action) { |
| |
| case BH_RECEIVE: |
| while(rx_get_frame(info, tty)); |
| break; |
| case BH_TRANSMIT: |
| bh_transmit(info, tty); |
| break; |
| case BH_STATUS: |
| bh_status(info); |
| break; |
| default: |
| /* unknown work item ID */ |
| printk("Unknown work item ID=%08X!\n", action); |
| break; |
| } |
| } |
| |
| tty_kref_put(tty); |
| if (debug_level >= DEBUG_LEVEL_BH) |
| printk("%s(%d):bh_handler(%s) exit\n", |
| __FILE__,__LINE__,info->device_name); |
| } |
| |
| static void bh_transmit(MGSLPC_INFO *info, struct tty_struct *tty) |
| { |
| if (debug_level >= DEBUG_LEVEL_BH) |
| printk("bh_transmit() entry on %s\n", info->device_name); |
| |
| if (tty) |
| tty_wakeup(tty); |
| } |
| |
| static void bh_status(MGSLPC_INFO *info) |
| { |
| info->ri_chkcount = 0; |
| info->dsr_chkcount = 0; |
| info->dcd_chkcount = 0; |
| info->cts_chkcount = 0; |
| } |
| |
| /* eom: non-zero = end of frame */ |
| static void rx_ready_hdlc(MGSLPC_INFO *info, int eom) |
| { |
| unsigned char data[2]; |
| unsigned char fifo_count, read_count, i; |
| RXBUF *buf = (RXBUF*)(info->rx_buf + (info->rx_put * info->rx_buf_size)); |
| |
| if (debug_level >= DEBUG_LEVEL_ISR) |
| printk("%s(%d):rx_ready_hdlc(eom=%d)\n", __FILE__, __LINE__, eom); |
| |
| if (!info->rx_enabled) |
| return; |
| |
| if (info->rx_frame_count >= info->rx_buf_count) { |
| /* no more free buffers */ |
| issue_command(info, CHA, CMD_RXRESET); |
| info->pending_bh |= BH_RECEIVE; |
| info->rx_overflow = true; |
| info->icount.buf_overrun++; |
| return; |
| } |
| |
| if (eom) { |
| /* end of frame, get FIFO count from RBCL register */ |
| fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f); |
| if (fifo_count == 0) |
| fifo_count = 32; |
| } else |
| fifo_count = 32; |
| |
| do { |
| if (fifo_count == 1) { |
| read_count = 1; |
| data[0] = read_reg(info, CHA + RXFIFO); |
| } else { |
| read_count = 2; |
| *((unsigned short *) data) = read_reg16(info, CHA + RXFIFO); |
| } |
| fifo_count -= read_count; |
| if (!fifo_count && eom) |
| buf->status = data[--read_count]; |
| |
| for (i = 0; i < read_count; i++) { |
| if (buf->count >= info->max_frame_size) { |
| /* frame too large, reset receiver and reset current buffer */ |
| issue_command(info, CHA, CMD_RXRESET); |
| buf->count = 0; |
| return; |
| } |
| *(buf->data + buf->count) = data[i]; |
| buf->count++; |
| } |
| } while (fifo_count); |
| |
| if (eom) { |
| info->pending_bh |= BH_RECEIVE; |
| info->rx_frame_count++; |
| info->rx_put++; |
| if (info->rx_put >= info->rx_buf_count) |
| info->rx_put = 0; |
| } |
| issue_command(info, CHA, CMD_RXFIFO); |
| } |
| |
| static void rx_ready_async(MGSLPC_INFO *info, int tcd) |
| { |
| struct tty_port *port = &info->port; |
| unsigned char data, status, flag; |
| int fifo_count; |
| int work = 0; |
| struct mgsl_icount *icount = &info->icount; |
| |
| if (tcd) { |
| /* early termination, get FIFO count from RBCL register */ |
| fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f); |
| |
| /* Zero fifo count could mean 0 or 32 bytes available. |
| * If BIT5 of STAR is set then at least 1 byte is available. |
| */ |
| if (!fifo_count && (read_reg(info,CHA+STAR) & BIT5)) |
| fifo_count = 32; |
| } else |
| fifo_count = 32; |
| |
| tty_buffer_request_room(port, fifo_count); |
| /* Flush received async data to receive data buffer. */ |
| while (fifo_count) { |
| data = read_reg(info, CHA + RXFIFO); |
| status = read_reg(info, CHA + RXFIFO); |
| fifo_count -= 2; |
| |
| icount->rx++; |
| flag = TTY_NORMAL; |
| |
| // if no frameing/crc error then save data |
| // BIT7:parity error |
| // BIT6:framing error |
| |
| if (status & (BIT7 + BIT6)) { |
| if (status & BIT7) |
| icount->parity++; |
| else |
| icount->frame++; |
| |
| /* discard char if tty control flags say so */ |
| if (status & info->ignore_status_mask) |
| continue; |
| |
| status &= info->read_status_mask; |
| |
| if (status & BIT7) |
| flag = TTY_PARITY; |
| else if (status & BIT6) |
| flag = TTY_FRAME; |
| } |
| work += tty_insert_flip_char(port, data, flag); |
| } |
| issue_command(info, CHA, CMD_RXFIFO); |
| |
| if (debug_level >= DEBUG_LEVEL_ISR) { |
| printk("%s(%d):rx_ready_async", |
| __FILE__,__LINE__); |
| printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n", |
| __FILE__,__LINE__,icount->rx,icount->brk, |
| icount->parity,icount->frame,icount->overrun); |
| } |
| |
| if (work) |
| tty_flip_buffer_push(port); |
| } |
| |
| |
| static void tx_done(MGSLPC_INFO *info, struct tty_struct *tty) |
| { |
| if (!info->tx_active) |
| return; |
| |
| info->tx_active = false; |
| info->tx_aborting = false; |
| |
| if (info->params.mode == MGSL_MODE_ASYNC) |
| return; |
| |
| info->tx_count = info->tx_put = info->tx_get = 0; |
| del_timer(&info->tx_timer); |
| |
| if (info->drop_rts_on_tx_done) { |
| get_signals(info); |
| if (info->serial_signals & SerialSignal_RTS) { |
| info->serial_signals &= ~SerialSignal_RTS; |
| set_signals(info); |
| } |
| info->drop_rts_on_tx_done = false; |
| } |
| |
| #if SYNCLINK_GENERIC_HDLC |
| if (info->netcount) |
| hdlcdev_tx_done(info); |
| else |
| #endif |
| { |
| if (tty && (tty->flow.stopped || tty->hw_stopped)) { |
| tx_stop(info); |
| return; |
| } |
| info->pending_bh |= BH_TRANSMIT; |
| } |
| } |
| |
| static void tx_ready(MGSLPC_INFO *info, struct tty_struct *tty) |
| { |
| unsigned char fifo_count = 32; |
| int c; |
| |
| if (debug_level >= DEBUG_LEVEL_ISR) |
| printk("%s(%d):tx_ready(%s)\n", __FILE__, __LINE__, info->device_name); |
| |
| if (info->params.mode == MGSL_MODE_HDLC) { |
| if (!info->tx_active) |
| return; |
| } else { |
| if (tty && (tty->flow.stopped || tty->hw_stopped)) { |
| tx_stop(info); |
| return; |
| } |
| if (!info->tx_count) |
| info->tx_active = false; |
| } |
| |
| if (!info->tx_count) |
| return; |
| |
| while (info->tx_count && fifo_count) { |
| c = min(2, min_t(int, fifo_count, min(info->tx_count, TXBUFSIZE - info->tx_get))); |
| |
| if (c == 1) { |
| write_reg(info, CHA + TXFIFO, *(info->tx_buf + info->tx_get)); |
| } else { |
| write_reg16(info, CHA + TXFIFO, |
| *((unsigned short*)(info->tx_buf + info->tx_get))); |
| } |
| info->tx_count -= c; |
| info->tx_get = (info->tx_get + c) & (TXBUFSIZE - 1); |
| fifo_count -= c; |
| } |
| |
| if (info->params.mode == MGSL_MODE_ASYNC) { |
| if (info->tx_count < WAKEUP_CHARS) |
| info->pending_bh |= BH_TRANSMIT; |
| issue_command(info, CHA, CMD_TXFIFO); |
| } else { |
| if (info->tx_count) |
| issue_command(info, CHA, CMD_TXFIFO); |
| else |
| issue_command(info, CHA, CMD_TXFIFO + CMD_TXEOM); |
| } |
| } |
| |
| static void cts_change(MGSLPC_INFO *info, struct tty_struct *tty) |
| { |
| get_signals(info); |
| if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) |
| irq_disable(info, CHB, IRQ_CTS); |
| info->icount.cts++; |
| if (info->serial_signals & SerialSignal_CTS) |
| info->input_signal_events.cts_up++; |
| else |
| info->input_signal_events.cts_down++; |
| wake_up_interruptible(&info->status_event_wait_q); |
| wake_up_interruptible(&info->event_wait_q); |
| |
| if (tty && tty_port_cts_enabled(&info->port)) { |
| if (tty->hw_stopped) { |
| if (info->serial_signals & SerialSignal_CTS) { |
| if (debug_level >= DEBUG_LEVEL_ISR) |
| printk("CTS tx start..."); |
| tty->hw_stopped = 0; |
| tx_start(info, tty); |
| info->pending_bh |= BH_TRANSMIT; |
| return; |
| } |
| } else { |
| if (!(info->serial_signals & SerialSignal_CTS)) { |
| if (debug_level >= DEBUG_LEVEL_ISR) |
| printk("CTS tx stop..."); |
| tty->hw_stopped = 1; |
| tx_stop(info); |
| } |
| } |
| } |
| info->pending_bh |= BH_STATUS; |
| } |
| |
| static void dcd_change(MGSLPC_INFO *info, struct tty_struct *tty) |
| { |
| get_signals(info); |
| if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) |
| irq_disable(info, CHB, IRQ_DCD); |
| info->icount.dcd++; |
| if (info->serial_signals & SerialSignal_DCD) { |
| info->input_signal_events.dcd_up++; |
| } |
| else |
| info->input_signal_events.dcd_down++; |
| #if SYNCLINK_GENERIC_HDLC |
| if (info->netcount) { |
| if (info->serial_signals & SerialSignal_DCD) |
| netif_carrier_on(info->netdev); |
| else |
| netif_carrier_off(info->netdev); |
| } |
| #endif |
| wake_up_interruptible(&info->status_event_wait_q); |
| wake_up_interruptible(&info->event_wait_q); |
| |
| if (tty_port_check_carrier(&info->port)) { |
| if (debug_level >= DEBUG_LEVEL_ISR) |
| printk("%s CD now %s...", info->device_name, |
| (info->serial_signals & SerialSignal_DCD) ? "on" : "off"); |
| if (info->serial_signals & SerialSignal_DCD) |
| wake_up_interruptible(&info->port.open_wait); |
| else { |
| if (debug_level >= DEBUG_LEVEL_ISR) |
| printk("doing serial hangup..."); |
| if (tty) |
| tty_hangup(tty); |
| } |
| } |
| info->pending_bh |= BH_STATUS; |
| } |
| |
| static void dsr_change(MGSLPC_INFO *info) |
| { |
| get_signals(info); |
| if ((info->dsr_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) |
| port_irq_disable(info, PVR_DSR); |
| info->icount.dsr++; |
| if (info->serial_signals & SerialSignal_DSR) |
| info->input_signal_events.dsr_up++; |
| else |
| info->input_signal_events.dsr_down++; |
| wake_up_interruptible(&info->status_event_wait_q); |
| wake_up_interruptible(&info->event_wait_q); |
| info->pending_bh |= BH_STATUS; |
| } |
| |
| static void ri_change(MGSLPC_INFO *info) |
| { |
| get_signals(info); |
| if ((info->ri_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) |
| port_irq_disable(info, PVR_RI); |
| info->icount.rng++; |
| if (info->serial_signals & SerialSignal_RI) |
| info->input_signal_events.ri_up++; |
| else |
| info->input_signal_events.ri_down++; |
| wake_up_interruptible(&info->status_event_wait_q); |
| wake_up_interruptible(&info->event_wait_q); |
| info->pending_bh |= BH_STATUS; |
| } |
| |
| /* Interrupt service routine entry point. |
| * |
| * Arguments: |
| * |
| * irq interrupt number that caused interrupt |
| * dev_id device ID supplied during interrupt registration |
| */ |
| static irqreturn_t mgslpc_isr(int dummy, void *dev_id) |
| { |
| MGSLPC_INFO *info = dev_id; |
| struct tty_struct *tty; |
| unsigned short isr; |
| unsigned char gis, pis; |
| int count=0; |
| |
| if (debug_level >= DEBUG_LEVEL_ISR) |
| printk("mgslpc_isr(%d) entry.\n", info->irq_level); |
| |
| if (!(info->p_dev->_locked)) |
| return IRQ_HANDLED; |
| |
| tty = tty_port_tty_get(&info->port); |
| |
| spin_lock(&info->lock); |
| |
| while ((gis = read_reg(info, CHA + GIS))) { |
| if (debug_level >= DEBUG_LEVEL_ISR) |
| printk("mgslpc_isr %s gis=%04X\n", info->device_name,gis); |
| |
| if ((gis & 0x70) || count > 1000) { |
| printk("synclink_cs:hardware failed or ejected\n"); |
| break; |
| } |
| count++; |
| |
| if (gis & (BIT1 | BIT0)) { |
| isr = read_reg16(info, CHB + ISR); |
| if (isr & IRQ_DCD) |
| dcd_change(info, tty); |
| if (isr & IRQ_CTS) |
| cts_change(info, tty); |
| } |
| if (gis & (BIT3 | BIT2)) |
| { |
| isr = read_reg16(info, CHA + ISR); |
| if (isr & IRQ_TIMER) { |
| info->irq_occurred = true; |
| irq_disable(info, CHA, IRQ_TIMER); |
| } |
| |
| /* receive IRQs */ |
| if (isr & IRQ_EXITHUNT) { |
| info->icount.exithunt++; |
| wake_up_interruptible(&info->event_wait_q); |
| } |
| if (isr & IRQ_BREAK_ON) { |
| info->icount.brk++; |
| if (info->port.flags & ASYNC_SAK) |
| do_SAK(tty); |
| } |
| if (isr & IRQ_RXTIME) { |
| issue_command(info, CHA, CMD_RXFIFO_READ); |
| } |
| if (isr & (IRQ_RXEOM | IRQ_RXFIFO)) { |
| if (info->params.mode == MGSL_MODE_HDLC) |
| rx_ready_hdlc(info, isr & IRQ_RXEOM); |
| else |
| rx_ready_async(info, isr & IRQ_RXEOM); |
| } |
| |
| /* transmit IRQs */ |
| if (isr & IRQ_UNDERRUN) { |
| if (info->tx_aborting) |
| info->icount.txabort++; |
| else |
| info->icount.txunder++; |
| tx_done(info, tty); |
| } |
| else if (isr & IRQ_ALLSENT) { |
| info->icount.txok++; |
| tx_done(info, tty); |
| } |
| else if (isr & IRQ_TXFIFO) |
| tx_ready(info, tty); |
| } |
| if (gis & BIT7) { |
| pis = read_reg(info, CHA + PIS); |
| if (pis & BIT1) |
| dsr_change(info); |
| if (pis & BIT2) |
| ri_change(info); |
| } |
| } |
| |
| /* Request bottom half processing if there's something |
| * for it to do and the bh is not already running |
| */ |
| |
| if (info->pending_bh && !info->bh_running && !info->bh_requested) { |
| if (debug_level >= DEBUG_LEVEL_ISR) |
| printk("%s(%d):%s queueing bh task.\n", |
| __FILE__,__LINE__,info->device_name); |
| schedule_work(&info->task); |
| info->bh_requested = true; |
| } |
| |
| spin_unlock(&info->lock); |
| tty_kref_put(tty); |
| |
| if (debug_level >= DEBUG_LEVEL_ISR) |
| printk("%s(%d):mgslpc_isr(%d)exit.\n", |
| __FILE__, __LINE__, info->irq_level); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /* Initialize and start device. |
| */ |
| static int startup(MGSLPC_INFO * info, struct tty_struct *tty) |
| { |
| int retval = 0; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):startup(%s)\n", __FILE__, __LINE__, info->device_name); |
| |
| if (tty_port_initialized(&info->port)) |
| return 0; |
| |
| if (!info->tx_buf) { |
| /* allocate a page of memory for a transmit buffer */ |
| info->tx_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL); |
| if (!info->tx_buf) { |
| printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n", |
| __FILE__, __LINE__, info->device_name); |
| return -ENOMEM; |
| } |
| } |
| |
| info->pending_bh = 0; |
| |
| memset(&info->icount, 0, sizeof(info->icount)); |
| |
| timer_setup(&info->tx_timer, tx_timeout, 0); |
| |
| /* Allocate and claim adapter resources */ |
| retval = claim_resources(info); |
| |
| /* perform existence check and diagnostics */ |
| if (!retval) |
| retval = adapter_test(info); |
| |
| if (retval) { |
| if (capable(CAP_SYS_ADMIN) && tty) |
| set_bit(TTY_IO_ERROR, &tty->flags); |
| release_resources(info); |
| return retval; |
| } |
| |
| /* program hardware for current parameters */ |
| mgslpc_change_params(info, tty); |
| |
| if (tty) |
| clear_bit(TTY_IO_ERROR, &tty->flags); |
| |
| tty_port_set_initialized(&info->port, 1); |
| |
| return 0; |
| } |
| |
| /* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware |
| */ |
| static void shutdown(MGSLPC_INFO * info, struct tty_struct *tty) |
| { |
| unsigned long flags; |
| |
| if (!tty_port_initialized(&info->port)) |
| return; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):mgslpc_shutdown(%s)\n", |
| __FILE__, __LINE__, info->device_name); |
| |
| /* clear status wait queue because status changes */ |
| /* can't happen after shutting down the hardware */ |
| wake_up_interruptible(&info->status_event_wait_q); |
| wake_up_interruptible(&info->event_wait_q); |
| |
| del_timer_sync(&info->tx_timer); |
| |
| if (info->tx_buf) { |
| free_page((unsigned long) info->tx_buf); |
| info->tx_buf = NULL; |
| } |
| |
| spin_lock_irqsave(&info->lock, flags); |
| |
| rx_stop(info); |
| tx_stop(info); |
| |
| /* TODO:disable interrupts instead of reset to preserve signal states */ |
| reset_device(info); |
| |
| if (!tty || C_HUPCL(tty)) { |
| info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR); |
| set_signals(info); |
| } |
| |
| spin_unlock_irqrestore(&info->lock, flags); |
| |
| release_resources(info); |
| |
| if (tty) |
| set_bit(TTY_IO_ERROR, &tty->flags); |
| |
| tty_port_set_initialized(&info->port, 0); |
| } |
| |
| static void mgslpc_program_hw(MGSLPC_INFO *info, struct tty_struct *tty) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&info->lock, flags); |
| |
| rx_stop(info); |
| tx_stop(info); |
| info->tx_count = info->tx_put = info->tx_get = 0; |
| |
| if (info->params.mode == MGSL_MODE_HDLC || info->netcount) |
| hdlc_mode(info); |
| else |
| async_mode(info); |
| |
| set_signals(info); |
| |
| info->dcd_chkcount = 0; |
| info->cts_chkcount = 0; |
| info->ri_chkcount = 0; |
| info->dsr_chkcount = 0; |
| |
| irq_enable(info, CHB, IRQ_DCD | IRQ_CTS); |
| port_irq_enable(info, (unsigned char) PVR_DSR | PVR_RI); |
| get_signals(info); |
| |
| if (info->netcount || (tty && C_CREAD(tty))) |
| rx_start(info); |
| |
| spin_unlock_irqrestore(&info->lock, flags); |
| } |
| |
| /* Reconfigure adapter based on new parameters |
| */ |
| static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty) |
| { |
| unsigned cflag; |
| int bits_per_char; |
| |
| if (!tty) |
| return; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):mgslpc_change_params(%s)\n", |
| __FILE__, __LINE__, info->device_name); |
| |
| cflag = tty->termios.c_cflag; |
| |
| /* if B0 rate (hangup) specified then negate RTS and DTR */ |
| /* otherwise assert RTS and DTR */ |
| if (cflag & CBAUD) |
| info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR; |
| else |
| info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR); |
| |
| /* byte size and parity */ |
| |
| info->params.data_bits = tty_get_char_size(cflag); |
| |
| if (cflag & CSTOPB) |
| info->params.stop_bits = 2; |
| else |
| info->params.stop_bits = 1; |
| |
| info->params.parity = ASYNC_PARITY_NONE; |
| if (cflag & PARENB) { |
| if (cflag & PARODD) |
| info->params.parity = ASYNC_PARITY_ODD; |
| else |
| info->params.parity = ASYNC_PARITY_EVEN; |
| #ifdef CMSPAR |
| if (cflag & CMSPAR) |
| info->params.parity = ASYNC_PARITY_SPACE; |
| #endif |
| } |
| |
| /* calculate number of jiffies to transmit a full |
| * FIFO (32 bytes) at specified data rate |
| */ |
| bits_per_char = info->params.data_bits + |
| info->params.stop_bits + 1; |
| |
| /* if port data rate is set to 460800 or less then |
| * allow tty settings to override, otherwise keep the |
| * current data rate. |
| */ |
| if (info->params.data_rate <= 460800) { |
| info->params.data_rate = tty_get_baud_rate(tty); |
| } |
| |
| if (info->params.data_rate) { |
| info->timeout = (32*HZ*bits_per_char) / |
| info->params.data_rate; |
| } |
| info->timeout += HZ/50; /* Add .02 seconds of slop */ |
| |
| tty_port_set_cts_flow(&info->port, cflag & CRTSCTS); |
| tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL); |
| |
| /* process tty input control flags */ |
| |
| info->read_status_mask = 0; |
| if (I_INPCK(tty)) |
| info->read_status_mask |= BIT7 | BIT6; |
| if (I_IGNPAR(tty)) |
| info->ignore_status_mask |= BIT7 | BIT6; |
| |
| mgslpc_program_hw(info, tty); |
| } |
| |
| /* Add a character to the transmit buffer |
| */ |
| static int mgslpc_put_char(struct tty_struct *tty, unsigned char ch) |
| { |
| MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) { |
| printk("%s(%d):mgslpc_put_char(%d) on %s\n", |
| __FILE__, __LINE__, ch, info->device_name); |
| } |
| |
| if (mgslpc_paranoia_check(info, tty->name, "mgslpc_put_char")) |
| return 0; |
| |
| if (!info->tx_buf) |
| return 0; |
| |
| spin_lock_irqsave(&info->lock, flags); |
| |
| if (info->params.mode == MGSL_MODE_ASYNC || !info->tx_active) { |
| if (info->tx_count < TXBUFSIZE - 1) { |
| info->tx_buf[info->tx_put++] = ch; |
| info->tx_put &= TXBUFSIZE-1; |
| info->tx_count++; |
| } |
| } |
| |
| spin_unlock_irqrestore(&info->lock, flags); |
| return 1; |
| } |
| |
| /* Enable transmitter so remaining characters in the |
| * transmit buffer are sent. |
| */ |
| static void mgslpc_flush_chars(struct tty_struct *tty) |
| { |
| MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):mgslpc_flush_chars() entry on %s tx_count=%d\n", |
| __FILE__, __LINE__, info->device_name, info->tx_count); |
| |
| if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_chars")) |
| return; |
| |
| if (info->tx_count <= 0 || tty->flow.stopped || |
| tty->hw_stopped || !info->tx_buf) |
| return; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):mgslpc_flush_chars() entry on %s starting transmitter\n", |
| __FILE__, __LINE__, info->device_name); |
| |
| spin_lock_irqsave(&info->lock, flags); |
| if (!info->tx_active) |
| tx_start(info, tty); |
| spin_unlock_irqrestore(&info->lock, flags); |
| } |
| |
| /* Send a block of data |
| * |
| * Arguments: |
| * |
| * tty pointer to tty information structure |
| * buf pointer to buffer containing send data |
| * count size of send data in bytes |
| * |
| * Returns: number of characters written |
| */ |
| static int mgslpc_write(struct tty_struct * tty, |
| const unsigned char *buf, int count) |
| { |
| int c, ret = 0; |
| MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):mgslpc_write(%s) count=%d\n", |
| __FILE__, __LINE__, info->device_name, count); |
| |
| if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write") || |
| !info->tx_buf) |
| goto cleanup; |
| |
| if (info->params.mode == MGSL_MODE_HDLC) { |
| if (count > TXBUFSIZE) { |
| ret = -EIO; |
| goto cleanup; |
| } |
| if (info->tx_active) |
| goto cleanup; |
| else if (info->tx_count) |
| goto start; |
| } |
| |
| for (;;) { |
| c = min(count, |
| min(TXBUFSIZE - info->tx_count - 1, |
| TXBUFSIZE - info->tx_put)); |
| if (c <= 0) |
| break; |
| |
| memcpy(info->tx_buf + info->tx_put, buf, c); |
| |
| spin_lock_irqsave(&info->lock, flags); |
| info->tx_put = (info->tx_put + c) & (TXBUFSIZE-1); |
| info->tx_count += c; |
| spin_unlock_irqrestore(&info->lock, flags); |
| |
| buf += c; |
| count -= c; |
| ret += c; |
| } |
| start: |
| if (info->tx_count && !tty->flow.stopped && !tty->hw_stopped) { |
| spin_lock_irqsave(&info->lock, flags); |
| if (!info->tx_active) |
| tx_start(info, tty); |
| spin_unlock_irqrestore(&info->lock, flags); |
| } |
| cleanup: |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):mgslpc_write(%s) returning=%d\n", |
| __FILE__, __LINE__, info->device_name, ret); |
| return ret; |
| } |
| |
| /* Return the count of free bytes in transmit buffer |
| */ |
| static unsigned int mgslpc_write_room(struct tty_struct *tty) |
| { |
| MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| int ret; |
| |
| if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write_room")) |
| return 0; |
| |
| if (info->params.mode == MGSL_MODE_HDLC) { |
| /* HDLC (frame oriented) mode */ |
| if (info->tx_active) |
| return 0; |
| else |
| return HDLC_MAX_FRAME_SIZE; |
| } else { |
| ret = TXBUFSIZE - info->tx_count - 1; |
| if (ret < 0) |
| ret = 0; |
| } |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):mgslpc_write_room(%s)=%d\n", |
| __FILE__, __LINE__, info->device_name, ret); |
| return ret; |
| } |
| |
| /* Return the count of bytes in transmit buffer |
| */ |
| static unsigned int mgslpc_chars_in_buffer(struct tty_struct *tty) |
| { |
| MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| unsigned int rc; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):mgslpc_chars_in_buffer(%s)\n", |
| __FILE__, __LINE__, info->device_name); |
| |
| if (mgslpc_paranoia_check(info, tty->name, "mgslpc_chars_in_buffer")) |
| return 0; |
| |
| if (info->params.mode == MGSL_MODE_HDLC) |
| rc = info->tx_active ? info->max_frame_size : 0; |
| else |
| rc = info->tx_count; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):mgslpc_chars_in_buffer(%s)=%u\n", |
| __FILE__, __LINE__, info->device_name, rc); |
| |
| return rc; |
| } |
| |
| /* Discard all data in the send buffer |
| */ |
| static void mgslpc_flush_buffer(struct tty_struct *tty) |
| { |
| MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):mgslpc_flush_buffer(%s) entry\n", |
| __FILE__, __LINE__, info->device_name); |
| |
| if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_buffer")) |
| return; |
| |
| spin_lock_irqsave(&info->lock, flags); |
| info->tx_count = info->tx_put = info->tx_get = 0; |
| del_timer(&info->tx_timer); |
| spin_unlock_irqrestore(&info->lock, flags); |
| |
| wake_up_interruptible(&tty->write_wait); |
| tty_wakeup(tty); |
| } |
| |
| /* Send a high-priority XON/XOFF character |
| */ |
| static void mgslpc_send_xchar(struct tty_struct *tty, char ch) |
| { |
| MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):mgslpc_send_xchar(%s,%d)\n", |
| __FILE__, __LINE__, info->device_name, ch); |
| |
| if (mgslpc_paranoia_check(info, tty->name, "mgslpc_send_xchar")) |
| return; |
| |
| info->x_char = ch; |
| if (ch) { |
| spin_lock_irqsave(&info->lock, flags); |
| if (!info->tx_enabled) |
| tx_start(info, tty); |
| spin_unlock_irqrestore(&info->lock, flags); |
| } |
| } |
| |
| /* Signal remote device to throttle send data (our receive data) |
| */ |
| static void mgslpc_throttle(struct tty_struct * tty) |
| { |
| MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):mgslpc_throttle(%s) entry\n", |
| __FILE__, __LINE__, info->device_name); |
| |
| if (mgslpc_paranoia_check(info, tty->name, "mgslpc_throttle")) |
| return; |
| |
| if (I_IXOFF(tty)) |
| mgslpc_send_xchar(tty, STOP_CHAR(tty)); |
| |
| if (C_CRTSCTS(tty)) { |
| spin_lock_irqsave(&info->lock, flags); |
| info->serial_signals &= ~SerialSignal_RTS; |
| set_signals(info); |
| spin_unlock_irqrestore(&info->lock, flags); |
| } |
| } |
| |
| /* Signal remote device to stop throttling send data (our receive data) |
| */ |
| static void mgslpc_unthrottle(struct tty_struct * tty) |
| { |
| MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):mgslpc_unthrottle(%s) entry\n", |
| __FILE__, __LINE__, info->device_name); |
| |
| if (mgslpc_paranoia_check(info, tty->name, "mgslpc_unthrottle")) |
| return; |
| |
| if (I_IXOFF(tty)) { |
| if (info->x_char) |
| info->x_char = 0; |
| else |
| mgslpc_send_xchar(tty, START_CHAR(tty)); |
| } |
| |
| if (C_CRTSCTS(tty)) { |
| spin_lock_irqsave(&info->lock, flags); |
| info->serial_signals |= SerialSignal_RTS; |
| set_signals(info); |
| spin_unlock_irqrestore(&info->lock, flags); |
| } |
| } |
| |
| /* get the current serial statistics |
| */ |
| static int get_stats(MGSLPC_INFO * info, struct mgsl_icount __user *user_icount) |
| { |
| int err; |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("get_params(%s)\n", info->device_name); |
| if (!user_icount) { |
| memset(&info->icount, 0, sizeof(info->icount)); |
| } else { |
| COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount)); |
| if (err) |
| return -EFAULT; |
| } |
| return 0; |
| } |
| |
| /* get the current serial parameters |
| */ |
| static int get_params(MGSLPC_INFO * info, MGSL_PARAMS __user *user_params) |
| { |
| int err; |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("get_params(%s)\n", info->device_name); |
| COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS)); |
| if (err) |
| return -EFAULT; |
| return 0; |
| } |
| |
| /* set the serial parameters |
| * |
| * Arguments: |
| * |
| * info pointer to device instance data |
| * new_params user buffer containing new serial params |
| * |
| * Returns: 0 if success, otherwise error code |
| */ |
| static int set_params(MGSLPC_INFO * info, MGSL_PARAMS __user *new_params, struct tty_struct *tty) |
| { |
| unsigned long flags; |
| MGSL_PARAMS tmp_params; |
| int err; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):set_params %s\n", __FILE__,__LINE__, |
| info->device_name); |
| COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS)); |
| if (err) { |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):set_params(%s) user buffer copy failed\n", |
| __FILE__, __LINE__, info->device_name); |
| return -EFAULT; |
| } |
| |
| spin_lock_irqsave(&info->lock, flags); |
| memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS)); |
| spin_unlock_irqrestore(&info->lock, flags); |
| |
| mgslpc_change_params(info, tty); |
| |
| return 0; |
| } |
| |
| static int get_txidle(MGSLPC_INFO * info, int __user *idle_mode) |
| { |
| int err; |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("get_txidle(%s)=%d\n", info->device_name, info->idle_mode); |
| COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int)); |
| if (err) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int set_txidle(MGSLPC_INFO * info, int idle_mode) |
| { |
| unsigned long flags; |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("set_txidle(%s,%d)\n", info->device_name, idle_mode); |
| spin_lock_irqsave(&info->lock, flags); |
| info->idle_mode = idle_mode; |
| tx_set_idle(info); |
| spin_unlock_irqrestore(&info->lock, flags); |
| return 0; |
| } |
| |
| static int get_interface(MGSLPC_INFO * info, int __user *if_mode) |
| { |
| int err; |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("get_interface(%s)=%d\n", info->device_name, info->if_mode); |
| COPY_TO_USER(err,if_mode, &info->if_mode, sizeof(int)); |
| if (err) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int set_interface(MGSLPC_INFO * info, int if_mode) |
| { |
| unsigned long flags; |
| unsigned char val; |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("set_interface(%s,%d)\n", info->device_name, if_mode); |
| spin_lock_irqsave(&info->lock, flags); |
| info->if_mode = if_mode; |
| |
| val = read_reg(info, PVR) & 0x0f; |
| switch (info->if_mode) |
| { |
| case MGSL_INTERFACE_RS232: val |= PVR_RS232; break; |
| case MGSL_INTERFACE_V35: val |= PVR_V35; break; |
| case MGSL_INTERFACE_RS422: val |= PVR_RS422; break; |
| } |
| write_reg(info, PVR, val); |
| |
| spin_unlock_irqrestore(&info->lock, flags); |
| return 0; |
| } |
| |
| static int set_txenable(MGSLPC_INFO * info, int enable, struct tty_struct *tty) |
| { |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("set_txenable(%s,%d)\n", info->device_name, enable); |
| |
| spin_lock_irqsave(&info->lock, flags); |
| if (enable) { |
| if (!info->tx_enabled) |
| tx_start(info, tty); |
| } else { |
| if (info->tx_enabled) |
| tx_stop(info); |
| } |
| spin_unlock_irqrestore(&info->lock, flags); |
| return 0; |
| } |
| |
| static int tx_abort(MGSLPC_INFO * info) |
| { |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("tx_abort(%s)\n", info->device_name); |
| |
| spin_lock_irqsave(&info->lock, flags); |
| if (info->tx_active && info->tx_count && |
| info->params.mode == MGSL_MODE_HDLC) { |
| /* clear data count so FIFO is not filled on next IRQ. |
| * This results in underrun and abort transmission. |
| */ |
| info->tx_count = info->tx_put = info->tx_get = 0; |
| info->tx_aborting = true; |
| } |
| spin_unlock_irqrestore(&info->lock, flags); |
| return 0; |
| } |
| |
| static int set_rxenable(MGSLPC_INFO * info, int enable) |
| { |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("set_rxenable(%s,%d)\n", info->device_name, enable); |
| |
| spin_lock_irqsave(&info->lock, flags); |
| if (enable) { |
| if (!info->rx_enabled) |
| rx_start(info); |
| } else { |
| if (info->rx_enabled) |
| rx_stop(info); |
| } |
| spin_unlock_irqrestore(&info->lock, flags); |
| return 0; |
| } |
| |
| /* wait for specified event to occur |
| * |
| * Arguments: info pointer to device instance data |
| * mask pointer to bitmask of events to wait for |
| * Return Value: 0 if successful and bit mask updated with |
| * of events triggerred, |
| * otherwise error code |
| */ |
| static int wait_events(MGSLPC_INFO * info, int __user *mask_ptr) |
| { |
| unsigned long flags; |
| int s; |
| int rc=0; |
| struct mgsl_icount cprev, cnow; |
| int events; |
| int mask; |
| struct _input_signal_events oldsigs, newsigs; |
| DECLARE_WAITQUEUE(wait, current); |
| |
| COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int)); |
| if (rc) |
| return -EFAULT; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("wait_events(%s,%d)\n", info->device_name, mask); |
| |
| spin_lock_irqsave(&info->lock, flags); |
| |
| /* return immediately if state matches requested events */ |
| get_signals(info); |
| s = info->serial_signals; |
| events = mask & |
| ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) + |
| ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) + |
| ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) + |
| ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) ); |
| if (events) { |
| spin_unlock_irqrestore(&info->lock, flags); |
| goto exit; |
| } |
| |
| /* save current irq counts */ |
| cprev = info->icount; |
| oldsigs = info->input_signal_events; |
| |
| if ((info->params.mode == MGSL_MODE_HDLC) && |
| (mask & MgslEvent_ExitHuntMode)) |
| irq_enable(info, CHA, IRQ_EXITHUNT); |
| |
| set_current_state(TASK_INTERRUPTIBLE); |
| add_wait_queue(&info->event_wait_q, &wait); |
| |
| spin_unlock_irqrestore(&info->lock, flags); |
| |
| |
| for(;;) { |
| schedule(); |
| if (signal_pending(current)) { |
| rc = -ERESTARTSYS; |
| break; |
| } |
| |
| /* get current irq counts */ |
| spin_lock_irqsave(&info->lock, flags); |
| cnow = info->icount; |
| newsigs = info->input_signal_events; |
| set_current_state(TASK_INTERRUPTIBLE); |
| spin_unlock_irqrestore(&info->lock, flags); |
| |
| /* if no change, wait aborted for some reason */ |
| if (newsigs.dsr_up == oldsigs.dsr_up && |
| newsigs.dsr_down == oldsigs.dsr_down && |
| newsigs.dcd_up == oldsigs.dcd_up && |
| newsigs.dcd_down == oldsigs.dcd_down && |
| newsigs.cts_up == oldsigs.cts_up && |
| newsigs.cts_down == oldsigs.cts_down && |
| newsigs.ri_up == oldsigs.ri_up && |
| newsigs.ri_down == oldsigs.ri_down && |
| cnow.exithunt == cprev.exithunt && |
| cnow.rxidle == cprev.rxidle) { |
| rc = -EIO; |
| break; |
| } |
| |
| events = mask & |
| ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) + |
| (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) + |
| (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) + |
| (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) + |
| (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) + |
| (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) + |
| (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) + |
| (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) + |
| (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) + |
| (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) ); |
| if (events) |
| break; |
| |
| cprev = cnow; |
| oldsigs = newsigs; |
| } |
| |
| remove_wait_queue(&info->event_wait_q, &wait); |
| set_current_state(TASK_RUNNING); |
| |
| if (mask & MgslEvent_ExitHuntMode) { |
| spin_lock_irqsave(&info->lock, flags); |
| if (!waitqueue_active(&info->event_wait_q)) |
| irq_disable(info, CHA, IRQ_EXITHUNT); |
| spin_unlock_irqrestore(&info->lock, flags); |
| } |
| exit: |
| if (rc == 0) |
| PUT_USER(rc, events, mask_ptr); |
| return rc; |
| } |
| |
| static int modem_input_wait(MGSLPC_INFO *info,int arg) |
| { |
| unsigned long flags; |
| int rc; |
| struct mgsl_icount cprev, cnow; |
| DECLARE_WAITQUEUE(wait, current); |
| |
| /* save current irq counts */ |
| spin_lock_irqsave(&info->lock, flags); |
| cprev = info->icount; |
| add_wait_queue(&info->status_event_wait_q, &wait); |
| set_current_state(TASK_INTERRUPTIBLE); |
| spin_unlock_irqrestore(&info->lock, flags); |
| |
| for(;;) { |
| schedule(); |
| if (signal_pending(current)) { |
| rc = -ERESTARTSYS; |
| break; |
| } |
| |
| /* get new irq counts */ |
| spin_lock_irqsave(&info->lock, flags); |
| cnow = info->icount; |
| set_current_state(TASK_INTERRUPTIBLE); |
| spin_unlock_irqrestore(&info->lock, flags); |
| |
| /* if no change, wait aborted for some reason */ |
| if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && |
| cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) { |
| rc = -EIO; |
| break; |
| } |
| |
| /* check for change in caller specified modem input */ |
| if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) || |
| (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) || |
| (arg & TIOCM_CD && cnow.dcd != cprev.dcd) || |
| (arg & TIOCM_CTS && cnow.cts != cprev.cts)) { |
| rc = 0; |
| break; |
| } |
| |
| cprev = cnow; |
| } |
| remove_wait_queue(&info->status_event_wait_q, &wait); |
| set_current_state(TASK_RUNNING); |
| return rc; |
| } |
| |
| /* return the state of the serial control and status signals |
| */ |
| static int tiocmget(struct tty_struct *tty) |
| { |
| MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| unsigned int result; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&info->lock, flags); |
| get_signals(info); |
| spin_unlock_irqrestore(&info->lock, flags); |
| |
| result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) + |
| ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) + |
| ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) + |
| ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) + |
| ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) + |
| ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0); |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s tiocmget() value=%08X\n", |
| __FILE__, __LINE__, info->device_name, result); |
| return result; |
| } |
| |
| /* set modem control signals (DTR/RTS) |
| */ |
| static int tiocmset(struct tty_struct *tty, |
| unsigned int set, unsigned int clear) |
| { |
| MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s tiocmset(%x,%x)\n", |
| __FILE__, __LINE__, info->device_name, set, clear); |
| |
| if (set & TIOCM_RTS) |
| info->serial_signals |= SerialSignal_RTS; |
| if (set & TIOCM_DTR) |
| info->serial_signals |= SerialSignal_DTR; |
| if (clear & TIOCM_RTS) |
| info->serial_signals &= ~SerialSignal_RTS; |
| if (clear & TIOCM_DTR) |
| info->serial_signals &= ~SerialSignal_DTR; |
| |
| spin_lock_irqsave(&info->lock, flags); |
| set_signals(info); |
| spin_unlock_irqrestore(&info->lock, flags); |
| |
| return 0; |
| } |
| |
| /* Set or clear transmit break condition |
| * |
| * Arguments: tty pointer to tty instance data |
| * break_state -1=set break condition, 0=clear |
| */ |
| static int mgslpc_break(struct tty_struct *tty, int break_state) |
| { |
| MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):mgslpc_break(%s,%d)\n", |
| __FILE__, __LINE__, info->device_name, break_state); |
| |
| if (mgslpc_paranoia_check(info, tty->name, "mgslpc_break")) |
| return -EINVAL; |
| |
| spin_lock_irqsave(&info->lock, flags); |
| if (break_state == -1) |
| set_reg_bits(info, CHA+DAFO, BIT6); |
| else |
| clear_reg_bits(info, CHA+DAFO, BIT6); |
| spin_unlock_irqrestore(&info->lock, flags); |
| return 0; |
| } |
| |
| static int mgslpc_get_icount(struct tty_struct *tty, |
| struct serial_icounter_struct *icount) |
| { |
| MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; |
| struct mgsl_icount cnow; /* kernel counter temps */ |
| unsigned long flags; |
| |
| spin_lock_irqsave(&info->lock, flags); |
| cnow = info->icount; |
| spin_unlock_irqrestore(&info->lock, flags); |
| |
| icount->cts = cnow.cts; |
| icount->dsr = cnow.dsr; |
| icount->rng = cnow.rng; |
| icount->dcd = cnow.dcd; |
| icount->rx = cnow.rx; |
| icount->tx = cnow.tx; |
| icount->frame = cnow.frame; |
| icount->overrun = cnow.overrun; |
| icount->parity = cnow.parity; |
| icount->brk = cnow.brk; |
| icount->buf_overrun = cnow.buf_overrun; |
| |
| return 0; |
| } |
| |
| /* Service an IOCTL request |
| * |
| * Arguments: |
| * |
| * tty pointer to tty instance data |
| * cmd IOCTL command code |
| * arg command argument/context |
| * |
| * Return Value: 0 if success, otherwise error code |
| */ |
| static int mgslpc_ioctl(struct tty_struct *tty, |
| unsigned int cmd, unsigned long arg) |
| { |
| MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; |
| void __user *argp = (void __user *)arg; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__, __LINE__, |
| info->device_name, cmd); |
| |
| if (mgslpc_paranoia_check(info, tty->name, "mgslpc_ioctl")) |
| return -ENODEV; |
| |
| if (cmd != TIOCMIWAIT) { |
| if (tty_io_error(tty)) |
| return -EIO; |
| } |
| |
| switch (cmd) { |
| case MGSL_IOCGPARAMS: |
| return get_params(info, argp); |
| case MGSL_IOCSPARAMS: |
| return set_params(info, argp, tty); |
| case MGSL_IOCGTXIDLE: |
| return get_txidle(info, argp); |
| case MGSL_IOCSTXIDLE: |
| return set_txidle(info, (int)arg); |
| case MGSL_IOCGIF: |
| return get_interface(info, argp); |
| case MGSL_IOCSIF: |
| return set_interface(info,(int)arg); |
| case MGSL_IOCTXENABLE: |
| return set_txenable(info,(int)arg, tty); |
| case MGSL_IOCRXENABLE: |
| return set_rxenable(info,(int)arg); |
| case MGSL_IOCTXABORT: |
| return tx_abort(info); |
| case MGSL_IOCGSTATS: |
| return get_stats(info, argp); |
| case MGSL_IOCWAITEVENT: |
| return wait_events(info, argp); |
| case TIOCMIWAIT: |
| return modem_input_wait(info,(int)arg); |
| default: |
| return -ENOIOCTLCMD; |
| } |
| return 0; |
| } |
| |
| /* Set new termios settings |
| * |
| * Arguments: |
| * |
| * tty pointer to tty structure |
| * termios pointer to buffer to hold returned old termios |
| */ |
| static void mgslpc_set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
| { |
| MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):mgslpc_set_termios %s\n", __FILE__, __LINE__, |
| tty->driver->name); |
| |
| /* just return if nothing has changed */ |
| if ((tty->termios.c_cflag == old_termios->c_cflag) |
| && (RELEVANT_IFLAG(tty->termios.c_iflag) |
| == RELEVANT_IFLAG(old_termios->c_iflag))) |
| return; |
| |
| mgslpc_change_params(info, tty); |
| |
| /* Handle transition to B0 status */ |
| if ((old_termios->c_cflag & CBAUD) && !C_BAUD(tty)) { |
| info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR); |
| spin_lock_irqsave(&info->lock, flags); |
| set_signals(info); |
| spin_unlock_irqrestore(&info->lock, flags); |
| } |
| |
| /* Handle transition away from B0 status */ |
| if (!(old_termios->c_cflag & CBAUD) && C_BAUD(tty)) { |
| info->serial_signals |= SerialSignal_DTR; |
| if (!C_CRTSCTS(tty) || !tty_throttled(tty)) |
| info->serial_signals |= SerialSignal_RTS; |
| spin_lock_irqsave(&info->lock, flags); |
| set_signals(info); |
| spin_unlock_irqrestore(&info->lock, flags); |
| } |
| |
| /* Handle turning off CRTSCTS */ |
| if (old_termios->c_cflag & CRTSCTS && !C_CRTSCTS(tty)) { |
| tty->hw_stopped = 0; |
| tx_release(tty); |
| } |
| } |
| |
| static void mgslpc_close(struct tty_struct *tty, struct file * filp) |
| { |
| MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; |
| struct tty_port *port = &info->port; |
| |
| if (mgslpc_paranoia_check(info, tty->name, "mgslpc_close")) |
| return; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):mgslpc_close(%s) entry, count=%d\n", |
| __FILE__, __LINE__, info->device_name, port->count); |
| |
| if (tty_port_close_start(port, tty, filp) == 0) |
| goto cleanup; |
| |
| if (tty_port_initialized(port)) |
| mgslpc_wait_until_sent(tty, info->timeout); |
| |
| mgslpc_flush_buffer(tty); |
| |
| tty_ldisc_flush(tty); |
| shutdown(info, tty); |
| |
| tty_port_close_end(port, tty); |
| tty_port_tty_set(port, NULL); |
| cleanup: |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__, __LINE__, |
| tty->driver->name, port->count); |
| } |
| |
| /* Wait until the transmitter is empty. |
| */ |
| static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout) |
| { |
| MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; |
| unsigned long orig_jiffies, char_time; |
| |
| if (!info) |
| return; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n", |
| __FILE__, __LINE__, info->device_name); |
| |
| if (mgslpc_paranoia_check(info, tty->name, "mgslpc_wait_until_sent")) |
| return; |
| |
| if (!tty_port_initialized(&info->port)) |
| goto exit; |
| |
| orig_jiffies = jiffies; |
| |
| /* Set check interval to 1/5 of estimated time to |
| * send a character, and make it at least 1. The check |
| * interval should also be less than the timeout. |
| * Note: use tight timings here to satisfy the NIST-PCTS. |
| */ |
| |
| if (info->params.data_rate) { |
| char_time = info->timeout/(32 * 5); |
| if (!char_time) |
| char_time++; |
| } else |
| char_time = 1; |
| |
| if (timeout) |
| char_time = min_t(unsigned long, char_time, timeout); |
| |
| if (info->params.mode == MGSL_MODE_HDLC) { |
| while (info->tx_active) { |
| msleep_interruptible(jiffies_to_msecs(char_time)); |
| if (signal_pending(current)) |
| break; |
| if (timeout && time_after(jiffies, orig_jiffies + timeout)) |
| break; |
| } |
| } else { |
| while ((info->tx_count || info->tx_active) && |
| info->tx_enabled) { |
| msleep_interruptible(jiffies_to_msecs(char_time)); |
| if (signal_pending(current)) |
| break; |
| if (timeout && time_after(jiffies, orig_jiffies + timeout)) |
| break; |
| } |
| } |
| |
| exit: |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n", |
| __FILE__, __LINE__, info->device_name); |
| } |
| |
| /* Called by tty_hangup() when a hangup is signaled. |
| * This is the same as closing all open files for the port. |
| */ |
| static void mgslpc_hangup(struct tty_struct *tty) |
| { |
| MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):mgslpc_hangup(%s)\n", |
| __FILE__, __LINE__, info->device_name); |
| |
| if (mgslpc_paranoia_check(info, tty->name, "mgslpc_hangup")) |
| return; |
| |
| mgslpc_flush_buffer(tty); |
| shutdown(info, tty); |
| tty_port_hangup(&info->port); |
| } |
| |
| static int carrier_raised(struct tty_port *port) |
| { |
| MGSLPC_INFO *info = container_of(port, MGSLPC_INFO, port); |
| unsigned long flags; |
| |
| spin_lock_irqsave(&info->lock, flags); |
| get_signals(info); |
| spin_unlock_irqrestore(&info->lock, flags); |
| |
| if (info->serial_signals & SerialSignal_DCD) |
| return 1; |
| return 0; |
| } |
| |
| static void dtr_rts(struct tty_port *port, int onoff) |
| { |
| MGSLPC_INFO *info = container_of(port, MGSLPC_INFO, port); |
| unsigned long flags; |
| |
| spin_lock_irqsave(&info->lock, flags); |
| if (onoff) |
| info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR; |
| else |
| info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR); |
| set_signals(info); |
| spin_unlock_irqrestore(&info->lock, flags); |
| } |
| |
| |
| static int mgslpc_open(struct tty_struct *tty, struct file * filp) |
| { |
| MGSLPC_INFO *info; |
| struct tty_port *port; |
| int retval, line; |
| unsigned long flags; |
| |
| /* verify range of specified line number */ |
| line = tty->index; |
| if (line >= mgslpc_device_count) { |
| printk("%s(%d):mgslpc_open with invalid line #%d.\n", |
| __FILE__, __LINE__, line); |
| return -ENODEV; |
| } |
| |
| /* find the info structure for the specified line */ |
| info = mgslpc_device_list; |
| while(info && info->line != line) |
| info = info->next_device; |
| if (mgslpc_paranoia_check(info, tty->name, "mgslpc_open")) |
| return -ENODEV; |
| |
| port = &info->port; |
| tty->driver_data = info; |
| tty_port_tty_set(port, tty); |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):mgslpc_open(%s), old ref count = %d\n", |
| __FILE__, __LINE__, tty->driver->name, port->count); |
| |
| spin_lock_irqsave(&info->netlock, flags); |
| if (info->netcount) { |
| retval = -EBUSY; |
| spin_unlock_irqrestore(&info->netlock, flags); |
| goto cleanup; |
| } |
| spin_lock(&port->lock); |
| port->count++; |
| spin_unlock(&port->lock); |
| spin_unlock_irqrestore(&info->netlock, flags); |
| |
| if (port->count == 1) { |
| /* 1st open on this device, init hardware */ |
| retval = startup(info, tty); |
| if (retval < 0) |
| goto cleanup; |
| } |
| |
| retval = tty_port_block_til_ready(&info->port, tty, filp); |
| if (retval) { |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):block_til_ready(%s) returned %d\n", |
| __FILE__, __LINE__, info->device_name, retval); |
| goto cleanup; |
| } |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):mgslpc_open(%s) success\n", |
| __FILE__, __LINE__, info->device_name); |
| retval = 0; |
| |
| cleanup: |
| return retval; |
| } |
| |
| /* |
| * /proc fs routines.... |
| */ |
| |
| static inline void line_info(struct seq_file *m, MGSLPC_INFO *info) |
| { |
| char stat_buf[30]; |
| unsigned long flags; |
| |
| seq_printf(m, "%s:io:%04X irq:%d", |
| info->device_name, info->io_base, info->irq_level); |
| |
| /* output current serial signal states */ |
| spin_lock_irqsave(&info->lock, flags); |
| get_signals(info); |
| spin_unlock_irqrestore(&info->lock, flags); |
| |
| stat_buf[0] = 0; |
| stat_buf[1] = 0; |
| if (info->serial_signals & SerialSignal_RTS) |
| strcat(stat_buf, "|RTS"); |
| if (info->serial_signals & SerialSignal_CTS) |
| strcat(stat_buf, "|CTS"); |
| if (info->serial_signals & SerialSignal_DTR) |
| strcat(stat_buf, "|DTR"); |
| if (info->serial_signals & SerialSignal_DSR) |
| strcat(stat_buf, "|DSR"); |
| if (info->serial_signals & SerialSignal_DCD) |
| strcat(stat_buf, "|CD"); |
| if (info->serial_signals & SerialSignal_RI) |
| strcat(stat_buf, "|RI"); |
| |
| if (info->params.mode == MGSL_MODE_HDLC) { |
| seq_printf(m, " HDLC txok:%d rxok:%d", |
| info->icount.txok, info->icount.rxok); |
| if (info->icount.txunder) |
| seq_printf(m, " txunder:%d", info->icount.txunder); |
| if (info->icount.txabort) |
| seq_printf(m, " txabort:%d", info->icount.txabort); |
| if (info->icount.rxshort) |
| seq_printf(m, " rxshort:%d", info->icount.rxshort); |
| if (info->icount.rxlong) |
| seq_printf(m, " rxlong:%d", info->icount.rxlong); |
| if (info->icount.rxover) |
| seq_printf(m, " rxover:%d", info->icount.rxover); |
| if (info->icount.rxcrc) |
| seq_printf(m, " rxcrc:%d", info->icount.rxcrc); |
| } else { |
| seq_printf(m, " ASYNC tx:%d rx:%d", |
| info->icount.tx, info->icount.rx); |
| if (info->icount.frame) |
| seq_printf(m, " fe:%d", info->icount.frame); |
| if (info->icount.parity) |
| seq_printf(m, " pe:%d", info->icount.parity); |
| if (info->icount.brk) |
| seq_printf(m, " brk:%d", info->icount.brk); |
| if (info->icount.overrun) |
| seq_printf(m, " oe:%d", info->icount.overrun); |
| } |
| |
| /* Append serial signal status to end */ |
| seq_printf(m, " %s\n", stat_buf+1); |
| |
| seq_printf(m, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n", |
| info->tx_active,info->bh_requested,info->bh_running, |
| info->pending_bh); |
| } |
| |
| /* Called to print information about devices |
| */ |
| static int mgslpc_proc_show(struct seq_file *m, void *v) |
| { |
| MGSLPC_INFO *info; |
| |
| seq_printf(m, "synclink driver:%s\n", driver_version); |
| |
| info = mgslpc_device_list; |
| while (info) { |
| line_info(m, info); |
| info = info->next_device; |
| } |
| return 0; |
| } |
| |
| static int rx_alloc_buffers(MGSLPC_INFO *info) |
| { |
| /* each buffer has header and data */ |
| info->rx_buf_size = sizeof(RXBUF) + info->max_frame_size; |
| |
| /* calculate total allocation size for 8 buffers */ |
| info->rx_buf_total_size = info->rx_buf_size * 8; |
| |
| /* limit total allocated memory */ |
| if (info->rx_buf_total_size > 0x10000) |
| info->rx_buf_total_size = 0x10000; |
| |
| /* calculate number of buffers */ |
| info->rx_buf_count = info->rx_buf_total_size / info->rx_buf_size; |
| |
| info->rx_buf = kmalloc(info->rx_buf_total_size, GFP_KERNEL); |
| if (info->rx_buf == NULL) |
| return -ENOMEM; |
| |
| /* unused flag buffer to satisfy receive_buf calling interface */ |
| info->flag_buf = kzalloc(info->max_frame_size, GFP_KERNEL); |
| if (!info->flag_buf) { |
| kfree(info->rx_buf); |
| info->rx_buf = NULL; |
| return -ENOMEM; |
| } |
| |
| rx_reset_buffers(info); |
| return 0; |
| } |
| |
| static void rx_free_buffers(MGSLPC_INFO *info) |
| { |
| kfree(info->rx_buf); |
| info->rx_buf = NULL; |
| kfree(info->flag_buf); |
| info->flag_buf = NULL; |
| } |
| |
| static int claim_resources(MGSLPC_INFO *info) |
| { |
| if (rx_alloc_buffers(info) < 0) { |
| printk("Can't allocate rx buffer %s\n", info->device_name); |
| release_resources(info); |
| return -ENODEV; |
| } |
| return 0; |
| } |
| |
| static void release_resources(MGSLPC_INFO *info) |
| { |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("release_resources(%s)\n", info->device_name); |
| rx_free_buffers(info); |
| } |
| |
| /* Add the specified device instance data structure to the |
| * global linked list of devices and increment the device count. |
| * |
| * Arguments: info pointer to device instance data |
| */ |
| static int mgslpc_add_device(MGSLPC_INFO *info) |
| { |
| MGSLPC_INFO *current_dev = NULL; |
| struct device *tty_dev; |
| int ret; |
| |
| info->next_device = NULL; |
| info->line = mgslpc_device_count; |
| sprintf(info->device_name,"ttySLP%d",info->line); |
| |
| if (info->line < MAX_DEVICE_COUNT) { |
| if (maxframe[info->line]) |
| info->max_frame_size = maxframe[info->line]; |
| } |
| |
| mgslpc_device_count++; |
| |
| if (!mgslpc_device_list) |
| mgslpc_device_list = info; |
| else { |
| current_dev = mgslpc_device_list; |
| while (current_dev->next_device) |
| current_dev = current_dev->next_device; |
| current_dev->next_device = info; |
| } |
| |
| if (info->max_frame_size < 4096) |
| info->max_frame_size = 4096; |
| else if (info->max_frame_size > 65535) |
| info->max_frame_size = 65535; |
| |
| printk("SyncLink PC Card %s:IO=%04X IRQ=%d\n", |
| info->device_name, info->io_base, info->irq_level); |
| |
| #if SYNCLINK_GENERIC_HDLC |
| ret = hdlcdev_init(info); |
| if (ret != 0) |
| goto failed; |
| #endif |
| |
| tty_dev = tty_port_register_device(&info->port, serial_driver, info->line, |
| &info->p_dev->dev); |
| if (IS_ERR(tty_dev)) { |
| ret = PTR_ERR(tty_dev); |
| #if SYNCLINK_GENERIC_HDLC |
| hdlcdev_exit(info); |
| #endif |
| goto failed; |
| } |
| |
| return 0; |
| |
| failed: |
| if (current_dev) |
| current_dev->next_device = NULL; |
| else |
| mgslpc_device_list = NULL; |
| mgslpc_device_count--; |
| return ret; |
| } |
| |
| static void mgslpc_remove_device(MGSLPC_INFO *remove_info) |
| { |
| MGSLPC_INFO *info = mgslpc_device_list; |
| MGSLPC_INFO *last = NULL; |
| |
| while(info) { |
| if (info == remove_info) { |
| if (last) |
| last->next_device = info->next_device; |
| else |
| mgslpc_device_list = info->next_device; |
| tty_unregister_device(serial_driver, info->line); |
| #if SYNCLINK_GENERIC_HDLC |
| hdlcdev_exit(info); |
| #endif |
| release_resources(info); |
| tty_port_destroy(&info->port); |
| kfree(info); |
| mgslpc_device_count--; |
| return; |
| } |
| last = info; |
| info = info->next_device; |
| } |
| } |
| |
| static const struct pcmcia_device_id mgslpc_ids[] = { |
| PCMCIA_DEVICE_MANF_CARD(0x02c5, 0x0050), |
| PCMCIA_DEVICE_NULL |
| }; |
| MODULE_DEVICE_TABLE(pcmcia, mgslpc_ids); |
| |
| static struct pcmcia_driver mgslpc_driver = { |
| .owner = THIS_MODULE, |
| .name = "synclink_cs", |
| .probe = mgslpc_probe, |
| .remove = mgslpc_detach, |
| .id_table = mgslpc_ids, |
| .suspend = mgslpc_suspend, |
| .resume = mgslpc_resume, |
| }; |
| |
| static const struct tty_operations mgslpc_ops = { |
| .open = mgslpc_open, |
| .close = mgslpc_close, |
| .write = mgslpc_write, |
| .put_char = mgslpc_put_char, |
| .flush_chars = mgslpc_flush_chars, |
| .write_room = mgslpc_write_room, |
| .chars_in_buffer = mgslpc_chars_in_buffer, |
| .flush_buffer = mgslpc_flush_buffer, |
| .ioctl = mgslpc_ioctl, |
| .throttle = mgslpc_throttle, |
| .unthrottle = mgslpc_unthrottle, |
| .send_xchar = mgslpc_send_xchar, |
| .break_ctl = mgslpc_break, |
| .wait_until_sent = mgslpc_wait_until_sent, |
| .set_termios = mgslpc_set_termios, |
| .stop = tx_pause, |
| .start = tx_release, |
| .hangup = mgslpc_hangup, |
| .tiocmget = tiocmget, |
| .tiocmset = tiocmset, |
| .get_icount = mgslpc_get_icount, |
| .proc_show = mgslpc_proc_show, |
| }; |
| |
| static int __init synclink_cs_init(void) |
| { |
| int rc; |
| |
| if (break_on_load) { |
| mgslpc_get_text_ptr(); |
| BREAKPOINT(); |
| } |
| |
| serial_driver = tty_alloc_driver(MAX_DEVICE_COUNT, |
| TTY_DRIVER_REAL_RAW | |
| TTY_DRIVER_DYNAMIC_DEV); |
| if (IS_ERR(serial_driver)) { |
| rc = PTR_ERR(serial_driver); |
| goto err; |
| } |
| |
| /* Initialize the tty_driver structure */ |
| serial_driver->driver_name = "synclink_cs"; |
| serial_driver->name = "ttySLP"; |
| serial_driver->major = ttymajor; |
| serial_driver->minor_start = 64; |
| serial_driver->type = TTY_DRIVER_TYPE_SERIAL; |
| serial_driver->subtype = SERIAL_TYPE_NORMAL; |
| serial_driver->init_termios = tty_std_termios; |
| serial_driver->init_termios.c_cflag = |
| B9600 | CS8 | CREAD | HUPCL | CLOCAL; |
| tty_set_operations(serial_driver, &mgslpc_ops); |
| |
| rc = tty_register_driver(serial_driver); |
| if (rc < 0) { |
| printk(KERN_ERR "%s(%d):Couldn't register serial driver\n", |
| __FILE__, __LINE__); |
| goto err_put_tty; |
| } |
| |
| rc = pcmcia_register_driver(&mgslpc_driver); |
| if (rc < 0) |
| goto err_unreg_tty; |
| |
| printk(KERN_INFO "%s %s, tty major#%d\n", driver_name, driver_version, |
| serial_driver->major); |
| |
| return 0; |
| err_unreg_tty: |
| tty_unregister_driver(serial_driver); |
| err_put_tty: |
| tty_driver_kref_put(serial_driver); |
| err: |
| return rc; |
| } |
| |
| static void __exit synclink_cs_exit(void) |
| { |
| pcmcia_unregister_driver(&mgslpc_driver); |
| tty_unregister_driver(serial_driver); |
| tty_driver_kref_put(serial_driver); |
| } |
| |
| module_init(synclink_cs_init); |
| module_exit(synclink_cs_exit); |
| |
| static void mgslpc_set_rate(MGSLPC_INFO *info, unsigned char channel, unsigned int rate) |
| { |
| unsigned int M, N; |
| unsigned char val; |
| |
| /* note:standard BRG mode is broken in V3.2 chip |
| * so enhanced mode is always used |
| */ |
| |
| if (rate) { |
| N = 3686400 / rate; |
| if (!N) |
| N = 1; |
| N >>= 1; |
| for (M = 1; N > 64 && M < 16; M++) |
| N >>= 1; |
| N--; |
| |
| /* BGR[5..0] = N |
| * BGR[9..6] = M |
| * BGR[7..0] contained in BGR register |
| * BGR[9..8] contained in CCR2[7..6] |
| * divisor = (N+1)*2^M |
| * |
| * Note: M *must* not be zero (causes asymetric duty cycle) |
| */ |
| write_reg(info, (unsigned char) (channel + BGR), |
| (unsigned char) ((M << 6) + N)); |
| val = read_reg(info, (unsigned char) (channel + CCR2)) & 0x3f; |
| val |= ((M << 4) & 0xc0); |
| write_reg(info, (unsigned char) (channel + CCR2), val); |
| } |
| } |
| |
| /* Enabled the AUX clock output at the specified frequency. |
| */ |
| static void enable_auxclk(MGSLPC_INFO *info) |
| { |
| unsigned char val; |
| |
| /* MODE |
| * |
| * 07..06 MDS[1..0] 10 = transparent HDLC mode |
| * 05 ADM Address Mode, 0 = no addr recognition |
| * 04 TMD Timer Mode, 0 = external |
| * 03 RAC Receiver Active, 0 = inactive |
| * 02 RTS 0=RTS active during xmit, 1=RTS always active |
| * 01 TRS Timer Resolution, 1=512 |
| * 00 TLP Test Loop, 0 = no loop |
| * |
| * 1000 0010 |
| */ |
| val = 0x82; |
| |
| /* channel B RTS is used to enable AUXCLK driver on SP505 */ |
| if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed) |
| val |= BIT2; |
| write_reg(info, CHB + MODE, val); |
| |
| /* CCR0 |
| * |
| * 07 PU Power Up, 1=active, 0=power down |
| * 06 MCE Master Clock Enable, 1=enabled |
| * 05 Reserved, 0 |
| * 04..02 SC[2..0] Encoding |
| * 01..00 SM[1..0] Serial Mode, 00=HDLC |
| * |
| * 11000000 |
| */ |
| write_reg(info, CHB + CCR0, 0xc0); |
| |
| /* CCR1 |
| * |
| * 07 SFLG Shared Flag, 0 = disable shared flags |
| * 06 GALP Go Active On Loop, 0 = not used |
| * 05 GLP Go On Loop, 0 = not used |
| * 04 ODS Output Driver Select, 1=TxD is push-pull output |
| * 03 ITF Interframe Time Fill, 0=mark, 1=flag |
| * 02..00 CM[2..0] Clock Mode |
| * |
| * 0001 0111 |
| */ |
| write_reg(info, CHB + CCR1, 0x17); |
| |
| /* CCR2 (Channel B) |
| * |
| * 07..06 BGR[9..8] Baud rate bits 9..8 |
| * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value |
| * 04 SSEL Clock source select, 1=submode b |
| * 03 TOE 0=TxCLK is input, 1=TxCLK is output |
| * 02 RWX Read/Write Exchange 0=disabled |
| * 01 C32, CRC select, 0=CRC-16, 1=CRC-32 |
| * 00 DIV, data inversion 0=disabled, 1=enabled |
| * |
| * 0011 1000 |
| */ |
| if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed) |
| write_reg(info, CHB + CCR2, 0x38); |
| else |
| write_reg(info, CHB + CCR2, 0x30); |
| |
| /* CCR4 |
| * |
| * 07 MCK4 Master Clock Divide by 4, 1=enabled |
| * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled |
| * 05 TST1 Test Pin, 0=normal operation |
| * 04 ICD Ivert Carrier Detect, 1=enabled (active low) |
| * 03..02 Reserved, must be 0 |
| * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes |
| * |
| * 0101 0000 |
| */ |
| write_reg(info, CHB + CCR4, 0x50); |
| |
| /* if auxclk not enabled, set internal BRG so |
| * CTS transitions can be detected (requires TxC) |
| */ |
| if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed) |
| mgslpc_set_rate(info, CHB, info->params.clock_speed); |
| else |
| mgslpc_set_rate(info, CHB, 921600); |
| } |
| |
| static void loopback_enable(MGSLPC_INFO *info) |
| { |
| unsigned char val; |
| |
| /* CCR1:02..00 CM[2..0] Clock Mode = 111 (clock mode 7) */ |
| val = read_reg(info, CHA + CCR1) | (BIT2 | BIT1 | BIT0); |
| write_reg(info, CHA + CCR1, val); |
| |
| /* CCR2:04 SSEL Clock source select, 1=submode b */ |
| val = read_reg(info, CHA + CCR2) | (BIT4 | BIT5); |
| write_reg(info, CHA + CCR2, val); |
| |
| /* set LinkSpeed if available, otherwise default to 2Mbps */ |
| if (info->params.clock_speed) |
| mgslpc_set_rate(info, CHA, info->params.clock_speed); |
| else |
| mgslpc_set_rate(info, CHA, 1843200); |
| |
| /* MODE:00 TLP Test Loop, 1=loopback enabled */ |
| val = read_reg(info, CHA + MODE) | BIT0; |
| write_reg(info, CHA + MODE, val); |
| } |
| |
| static void hdlc_mode(MGSLPC_INFO *info) |
| { |
| unsigned char val; |
| unsigned char clkmode, clksubmode; |
| |
| /* disable all interrupts */ |
| irq_disable(info, CHA, 0xffff); |
| irq_disable(info, CHB, 0xffff); |
| port_irq_disable(info, 0xff); |
| |
| /* assume clock mode 0a, rcv=RxC xmt=TxC */ |
| clkmode = clksubmode = 0; |
| if (info->params.flags & HDLC_FLAG_RXC_DPLL |
| && info->params.flags & HDLC_FLAG_TXC_DPLL) { |
| /* clock mode 7a, rcv = DPLL, xmt = DPLL */ |
| clkmode = 7; |
| } else if (info->params.flags & HDLC_FLAG_RXC_BRG |
| && info->params.flags & HDLC_FLAG_TXC_BRG) { |
| /* clock mode 7b, rcv = BRG, xmt = BRG */ |
| clkmode = 7; |
| clksubmode = 1; |
| } else if (info->params.flags & HDLC_FLAG_RXC_DPLL) { |
| if (info->params.flags & HDLC_FLAG_TXC_BRG) { |
| /* clock mode 6b, rcv = DPLL, xmt = BRG/16 */ |
| clkmode = 6; |
| clksubmode = 1; |
| } else { |
| /* clock mode 6a, rcv = DPLL, xmt = TxC */ |
| clkmode = 6; |
| } |
| } else if (info->params.flags & HDLC_FLAG_TXC_BRG) { |
| /* clock mode 0b, rcv = RxC, xmt = BRG */ |
| clksubmode = 1; |
| } |
| |
| /* MODE |
| * |
| * 07..06 MDS[1..0] 10 = transparent HDLC mode |
| * 05 ADM Address Mode, 0 = no addr recognition |
| * 04 TMD Timer Mode, 0 = external |
| * 03 RAC Receiver Active, 0 = inactive |
| * 02 RTS 0=RTS active during xmit, 1=RTS always active |
| * 01 TRS Timer Resolution, 1=512 |
| * 00 TLP Test Loop, 0 = no loop |
| * |
| * 1000 0010 |
| */ |
| val = 0x82; |
| if (info->params.loopback) |
| val |= BIT0; |
| |
| /* preserve RTS state */ |
| if (info->serial_signals & SerialSignal_RTS) |
| val |= BIT2; |
| write_reg(info, CHA + MODE, val); |
| |